Hybrid Maize X13B645 Trait Stacking Segmentation
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Solution Overview
Problem
Current maize breeding techniques face challenges in combining desirable traits such as disease resistance, drought tolerance, and high yield while maintaining uniformity and stability in hybrid maize varieties.
Innovation Solution
Development of the hybrid maize variety X13B645 through crossing proprietary Pioneer Hi-Bred International inbred varieties, incorporating locus conversion and transformation to introduce specific traits, and using methods like backcrossing and molecular marker-assisted breeding to enhance genetic integrity and introduce desired characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional plant breeding is used to combine multiple desirable traits, then disease resistance and drought tolerance can be improved, but maintaining uniformity and stability of the hybrid becomes difficult
Solution Approach 1:
The patent segments the breeding process into distinct phases: developing inbred lines with specific traits, then crossing them to produce hybrids. This segmentation allows each parent line to be optimized for specific traits (disease resistance, drought tolerance) while the hybrid maintains uniformity through controlled crossbreeding of homozygous parents.
Solution Approach 2:
The patent applies preliminary action by developing and stabilizing inbred parent lines through multiple generations of selfing and selection before crossing. This preliminary stabilization of parental genetics ensures that the resulting hybrid will be uniform and stable, as the parents have already been purified for desired traits.
2Productivity
If multiple traits are combined in a single hybrid, then yield and stress resistance improve, but the complexity of breeding and maintaining genetic integrity increases
Solution Approach 1:
The patent merges multiple desirable traits into a single hybrid by crossing inbred lines that each contribute specific traits. The hybrid combines disease resistance, drought tolerance, and high yield potential from its parents into one unified variety, achieving trait stacking through controlled breeding rather than complex genetic engineering.
Solution Approach 2:
The inbred parent lines serve as intermediaries that carry specific traits from diverse genetic sources. By using these standardized inbred intermediaries, the breeding process becomes more manageable - each inbred line is a stable, well-characterized unit that can be reliably crossed to produce predictable hybrids with combined traits.
3Manufacturing precision
If inbred varieties are crossed to produce hybrids, then uniformity and yield are improved, but the time to crop maturity may increase
Solution Approach 1:
The patent optimizes the parameters of the inbred parent lines - selecting for not only uniformity and yield potential but also for appropriate maturity timing. By adjusting the genetic parameters of the parents during inbred development, the resulting hybrid achieves both uniformity and acceptable maturity time, balancing these competing requirements through selective breeding.
Data Source
AI summary
A novel maize variety designated X13B645 and seed, plants and plant parts thereof, produced by crossing Pioneer Hi-Bred International, Inc. proprietary inbred maize varieties. Methods for producing a maize plant that comprises crossing hybrid maize variety X13B645 with another maize plant. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into X13B645 through backcross conversion and/or transformation, and to the maize seed, plant and plant part produced thereby. This invention relates to the maize variety X13B645, the seed, the plant produced from the seed, and variants, mutants, and minor modifications of maize variety X13B645. This invention further relates to methods for producing maize varieties derived from maize variety X13B645.